downbearing direction

[Stéphane Collin]

Hi Ric.

I did your interesting experiment on a 9ft grand (thanks for sharing it).  Well, in my opinion (worth as much as ... ), the piano sounds better, I think, without the coin.
But I intend to do the experiment on an upright (where the hammer strikes in the direction of the downbearing).  I just have problems balancing the coin. 

Stéphane Collin.



RicB said : 
| Here's a cute little experiement tho to illustrate a bit of the amount
| of force that yanks upwards on the bridge and front pin. Place a penny
| (or similiar coin) on the string just front of the bridge so that the
| penny is balanced on its thin edge and as close to the bridge pin as
| possible. It should balance fairly easily between two strings of a
| unison. Then bang on the string with a very hard blow and watch what
| happens (how fast and with how much force). Do the same thing for
| several strings of various lengths. You might also try placing the penny
| up as close to the aggraffes / capo bar as you can to see what happens
| there as well... just for fun.
| 
| Cheers
| RicB
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